Rockwell-automation 1771-QA Stepper Positioning Assembly User Manual Manual de usuario Pagina 74
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Valorado. / 5. Basado en revisión del cliente
3–52 Programming and Operation
Publication 1771-UM002A–EN–P – May 2000
If ORT
Prog
in equation 3a is zero, then ORT
Act
will be instantaneous
(<
10ms).
The equation parameters (ORT
Act
, ORT
Prog
, OFR, and IR) and a
sketch of the move are shown in Figure 3.24.
Example Problem 1:
An override ramp time is programmed for 6.2 seconds. What will be
the actual override ramp time if the override is enabled while a rate
(IR) of 8k pulses per second is being executed? The final rate of the
override move is 10k.
Solution: Write down the known facts.
IR = 8k pulses per second
OFR = 10k pulses per second
ORT
Act
= 6.2 seconds
ORT
Act
ORT
Prog
x
|OFR–IR|
OFR
ORT
Act
6.2 x
|10k–8k|
10K
6.2x
2k
10k
ORT
Act
1.24seconds
This is the range of 0-9.99 seconds and is therefore acceptable. If
the initial rate had been greater than 10k, then the absolute value of
|OFR-IR| (negative difference considered as if positive) would have
been used.
- Positioning 1
- Assembly 1
- Allen-Bradley 1
- Important User 2
- Information 2
- Table of Contents 3
- Table of Contentsii 4
- Example Programs 5
- CSA Hazardous Location 5
- Approval 5
- Table of Contentsiv 6
- 7
- Understand Compliance to 8
- European Union Directives 8
- 1–3Introduction 9
- 1–4 Introduction 10
- Assembly and Installation 11
- Power Supply 12
- Considerations 12
- Pulse Output Expander 13
- Table 2.A 14
- Figure 2.2 14
- Output Format (S1) 15
- Input Logic (S2) 16
- Expander Module Address (S3) 16
- Switch Assembly S3 Expander 17
- ON OFF OFF 1 17
- OFF ON OFF 2 17
- ON ON OFF 3 17
- Diagnostic Indicators 18
- Installation 19
- Compatibility 21
- Module Specifications 21
- Pr ogramming and Operation 23
- Move Definition 24
- Positioning Modes 25
- MS Preset Word 30
- Not Used (Must be zero) 31
- 17 10 07 00 36
- Move Block 39
- • Single Move Control Word 39
- • Move Data 39
- Status Block 42
- • Status Word 42
- • Position Word 42
- Block Transfer 47
- Programming 47
- Programming Considerations 52
- , bit 13 54
- Table 3.A 56
- Size of Data Files 56
- Handshaking 57
- 13 Command Verify 00 59
- • Program length = 2K words 65
- Application 66
- Resonant Frequency 76
- Table 3.C 77
- Output Accuracy 77
- Table 3.D 77
- Ramp and Decel Time Accuracy 77
- Minimum Move Time 78
- Example Pr ograms 79
- Programming a 1-Axis Profile 80
- Example 1-Axis Program 83
- HEXADECIMAL DATA MONITOR 85
- FILE-TO-FILE MOVE 85
- POSITION: 001 85
- 4–8 Example Programs 86
- 4–9Example Programs 87
- Table 4.A 87
- Ignored in this example 88
- 4–11Example Programs 89
- 4–12 Example Programs 90
- 4–14 Example Programs 92
- 3-Axis Program 93
- Programming a 3-Axis 96
- 4–19Example Programs 97
- Example 3-Axis Program 98
- MS Preset 104
- 4–36 Example Programs 114
- 4–37Example Programs 115
- 4–38 Example Programs 116
- Operational Summary 117
- 4–42 Example Programs 120
- Tr oubleshooting 121
- 5–2 Troubleshooting 122
- Table 5.A 122
- Power-Up Troubleshooting 122
- Troubleshooting 124
- Illegal Bit Combinations 125
- 5–6 Troubleshooting 126
- Specifications 127
- CSA Hazar dous Location 129
- Appr oval 129
- Worldwide representation 132
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